The killer whale season in Caleta Valdés is also unpredictable, between October and December the orcas visit the elephant seal colonies, searching for the offspring of elephant seals that are distributed along the coast. Spring, from the southern hemisphere, has the Peninsula Valdes flourishing infauna. The high season of penguins, whales, birds, elephants seals and sea lions, ensure the full encounter with wildlife.
The female elephant seals from the beginning of September to the first days of October, come from months of being in the open sea to give birth in the coasts of Peninsula Valdes. The pregnant females are the first to arrive and distribute among the 500 harems of elephant seals in the 125 mi ( 200 km ) of the marine coast of Peninsula Valdes. There are around 20,000 specimens that arrive on these coasts throughout the season. The pups are breastfed for approximately three weeks, increasing 9 lb ( 4 kg ) of weight per day. After which they are totally independent of the mother. When the baby is 2 and a half months old, he is ready to enter the sea and get his own food, which will become the diet of his whole life, made up of octopus, squid and other fish. This is the moment when orcas appear in action.